package main

import (
	"fmt"
	"log"

	"github.com/libgit2/git2go"
)

func main() {
	repo, err := git.OpenRepository("/home/lu/t/libgit2")
	if err != nil {
		log.Fatal("opening repository: ", err)
	}

	head, err := repo.Head()
	if err != nil {
		log.Fatal("getting HEAD: ", err)
	}

	commit, err := repo.LookupCommit(head.Target())
	if err != nil {
		log.Fatal("resolving HEAD: ", err)
	}

	fmt.Printf("Commit: %s\nAuthor: %s\nDate: %s\n\n%s", commit.TreeId(), commit.Author().Name, commit.Author().When, commit.Message())

	tree, err := commit.Tree()
	if err != nil {
		log.Fatal("getting tree: ", err)
	}

	err = tree.Walk(func(name string, entry *git.TreeEntry) int {
		obj, err := repo.Lookup(entry.Id)
		if err != nil {
			log.Fatal("lookup: ", err)
		}
		fmt.Printf("%s (%s)\n", entry.Name, obj.Type())
		return 1
	})
	if err != nil {
		log.Fatal("walking tree: ", err)
	}
}